Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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892
AUUS46 KPDT 251228
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
528 AM PDT TUE JUL 25 2017

*** AIR DISPERSION CATEGORIES:   GOOD, FAIR, POOR ***

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E=SE 3-9 MPH.       WNW-N 5-7 MPH.
TRANSPORT WINDS               E-SE 3-9 MPH.       W-NW 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED JUL 26        FAIR.

VENTILATION INDEX (CATEGORY)  30 (POOR).          345 (FAIR).
OUTLOOK FOR WED JUL 26        264 (POOR).

FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 5-10 MPH.      SE 2-5 MPH.
TRANSPORT WINDS               W-NW 5-10 MPH.      NW 0-2 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED JUL 26        GOOD.

VENTILATION INDEX (CATEGORY)  71 (POOR).          139 (POOR).
OUTLOOK FOR WED JUL 26        493 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE-S 2-6 MPH.       N 4-9 MPH.
TRANSPORT WINDS               SE-S 2-6 MPH.       NW-W 5-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED JUL 26        GOOD.

VENTILATION INDEX (CATEGORY)  30 (POOR).          367 (FAIR).
OUTLOOK FOR WED JUL 26        211 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      103 (POOR)
ELLENSBURG    111 (POOR)
GOLDENDALE    104 (POOR)
TRI-CITIES    353 (FAIR)
WALLA WALLA   367 (FAIR)
YAKIMA         76 (POOR)
BEND          144 (POOR)
PRINEVILLE    160 (POOR)
ENTERPRISE    279 (POOR)
HERMISTON     317 (FAIR)
JOHN DAY      360 (FAIR)
LA GRANDE     379 (FAIR)
MADRAS        281 (POOR)
MEACHAM       266 (POOR)
PENDLETON     342 (FAIR)
REDMOND       180 (POOR)
SENECA        232 (POOR)
THE DALLES    155 (POOR)

METEOROLOGICAL INFORMATION PROVIDED IN THIS PRODUCT REPRESENTS ONLY
SOME OF THE FACTORS USED IN BURN DECISIONS.  BURN DECISIONS ARE
OUTSIDE THE PURVIEW OF THE NATIONAL WEATHER SERVICE.

THE VENTILATION INDEX IS A TOOL TO ASSIST SMOKE MANAGEMENT
AGENCIES IN DETERMINING BURN OR NO BURN DECISIONS.  A VENTILATION
INDEX GRAPHIC IS ON THE PENDLETON WEBSITE AT THE FOLLOWING ADDRESS:
HTTP://WWW.WRH.NOAA.GOV/PDT/FORECAST/FWXGRAPHICALVENTILATION.PHP?WFO=PDT

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
$$



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